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People gather in Centennial Plaza in Midland, Texas on Saturday, Nov. 17, 2012 for a candlelight vigil held in honor of four veterans who were killed when a freight train hit a parade float Thursday. (AP Photo/Midland Reporter-Telegram, James Durbin)

People gather in Centennial Plaza in Midland, Texas on Saturday, Nov. 17, 2012 for a candlelight vigil held in honor of four veterans who were killed when a freight train hit a parade float Thursday. (AP Photo/Midland Reporter-Telegram, James Durbin)